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$314+ Cheap flights from Fremont, CA to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Sofia are usually found in January or October, booked 47 days in advance, depart on a Thursday or Sunday and return on a Saturday

Cheap flight deals from Fremont to Sofia

Cheapest flights from Fremont to Sofia
Explore the most affordable flight options available from Fremont to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This Gotogate deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/169:40 pmSFO - SOF
1 stop15h 05mLufthansa
Sun 12/282:00 pmSOF - SFO
1 stop15h 35mLufthansa
Deal found 12/15$1,233
This CrystalTravel deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/169:40 pmSFO - SOF
2 stops28h 10mAustrian Airlines
Sun 12/286:45 pmSOF - SFO
2 stops27h 55mAustrian Airlines
Deal found 12/15$1,324
This Travelocity deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/171:50 pmSFO - SOF
2 stops61h 25mLufthansa
Sun 12/286:10 amSOF - SFO
1 stop24h 00mLufthansa
Deal found 12/15$1,812
This Travelocity deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/171:50 pmSFO - SOF
2 stops61h 25mMultiple Airlines
Sun 12/2812:35 pmSOF - SFO
2 stops34h 05mMultiple Airlines
Deal found 12/15$1,840
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1910:48 pmSFO - SOF
2 stops38h 22mMultiple Airlines
Sat 12/272:00 pmSOF - SFO
1 stop15h 35mMultiple Airlines
Deal found 12/15$2,224
This Gurufare deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/191:30 pmSFO - SOF
1 stop23h 15mLufthansa
Sat 12/276:25 amSOF - SFO
1 stop16h 15mLufthansa
Deal found 12/15$2,303
This Expedia deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/169:22 amSFO - SOF
3 stops42h 03mMultiple Airlines
Sun 12/286:45 pmSOF - SFO
2 stops34h 50mMultiple Airlines
Deal found 12/15$3,132

Find flight deals from Fremont to Sofia

Keep the following information in mind while searching for Fremont to Sofia flight deals. Data was last updated December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$590
(CrystalTravel)

One-way from

$314
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,146
Provider with most accurate pricing for San Francisco-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Sofia flights.
Search Deals
From Fremont to Sofia
Search Deals
One-way flight from Fremont to Sofia
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($349 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fremont to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
Use the filters below to find and compare flights from Fremont to Sofia that are best for you.

Fly from

Fremont

Fly to

Sofia

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sat 1/17

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Sat 2/7

6:25 am-12:40 pm

1 stop16h 15m

$590

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sat 3/7

8:40 pm-4:20 pm

1 stop33h 40m

Sofia

Sun 3/15

2:30 pm-7:45 pm

1 stop38h 15m

$596

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 1/29

6:50 pm-8:45 am

1 stop27h 55m

Sofia

Thu 2/5

4:00 pm-4:45 pm

1 stop34h 45m

$610

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 2/3

8:25 am-1:15 pm

2 stops18h 50m

Sofia

Mon 2/9

6:10 am-12:40 pm

1 stop16h 30m

$610

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 1/15

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Thu 1/22

6:05 am-12:40 pm

2 stops16h 35m

$612

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 1/29

2:40 pm-10:45 pm

1 stop22h 05m

Sofia

Thu 2/5

6:00 am-10:54 am

2 stops38h 54m

$618

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 1/29

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

Mon 2/2

6:10 am-12:40 pm

1 stop16h 30m

$619

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sat 1/10

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Mon 1/26

6:10 am-12:40 pm

1 stop16h 30m

$619

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 1/21

4:35 pm-2:35 pm

3 stops36h 00m

$314

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 1/19

4:35 pm-1:20 pm

3 stops34h 45m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 14 results
1
2

Best time to book a flight from Fremont to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Fremont with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fremont to Sofia

How far ahead should I book a flight from Fremont to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Sofia. Price data was last updated on December 12, 2025.

The price you pay for your flight from Fremont to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 47 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Fremont to Sofia?

Currently, August is the cheapest month in which you can book a flight from Fremont to Sofia (average of $439). Flying from Fremont to Sofia in June is currently the most expensive (average of $823). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from FR8 to SOF?

Find hourly flight availability from Fremont to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 16, 2025.

When flying from Fremont to Sofia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 28% versus a flight at noon.

What is the cheapest day to fly from Fremont to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Fremont to Sofia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Fremont to Sofia flight should consider departing on Thursday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated December 16, 2025.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Lufthansa from Fremont to Sofia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,094 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,094 reviews
United Airlines
7.4
Good
9,094 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
4,104 reviews
United Airlines
7.4
Good
9,094 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,632 reviews
United Airlines
7.4
Good
9,094 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
ITA Airways
6.7
Okay
1,107 reviews
United Airlines
7.4
Good
9,094 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Fremont to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Fremont?

    Sofia (SOF) is the airport you will fly into if you book a flight from Fremont to Sofia. You should not have trouble finding flights to Sofia from Fremont; the airport handles an average of 0 inbound flights from Fremont per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the Sofia airport from Fremont. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • How long is the flight from Fremont to Sofia?

    Airlines like Lufthansa, British Airways, and Turkish Airlines fly from Fremont to Sofia in about 15h 05m. The time it takes to get you to your destination can typically vary by up to 18h 35m. The distance from Fremont to Sofia is about 6481 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Fremont to Sofia one-way?

    One-way options have recently been found by users for as low as $339 on Lufthansa. Other airlines that offer cheap prices include KLM from $461 and United Airlines from $464 one-way.

  • Can I find deals for flights from Fremont to Sofia that include hotel bookings?

    Yes. In addition to deals on Fremont to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fremont to Sofia.

  • Can I find deals for business class flights from Fremont to Sofia?

    Yes. Cheapflights offers flight deals from Fremont to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fremont to Sofia?

    Currently, August is the cheapest month in which you can book a flight from Fremont to Sofia (average of $439). Flying from Fremont to Sofia in June is currently the most expensive (average of $823). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 4 airlines flying from Fremont to Sofia

Discover the top 4 airlines that operate flights from Fremont to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$542Average$685FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$565Average$896FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$616Average$942FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$652Average$1,154FlexibilityNo cancel feeOn-time81%

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